The A16B-1212-0871 functions as a power supply unit within the GE Fanuc CNC control family. This module converts incoming AC line power into regulated DC rails for control boards and I/O circuits. Maintenance teams rely on it for stable operation in machining centers and lathes.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | A16B-1212-0871 |
| Category | Power Supply Unit |
| Input Voltage | 200 to 240 Vac, single phase |
| Input Frequency | 50 / 60 Hz |
| Output Voltage | +5 Vdc, +12 Vdc, -12 Vdc, +24 Vdc |
| Output Power | Approx. 150 W total |
| Backplane Current | Up to 20 A at 5 Vdc |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -20°C to +70°C |
| Weight | Approx. 2.5 kg |
| Dimensions | 250 mm × 150 mm × 80 mm |
| Cooling | Natural convection |
| Connector Type | Plug-in backplane connector |
| Part Count | Single-unit assembly |
Signal Path and Interface Details
The unit accepts single-phase AC power through a terminal block on the chassis. Subsequently, internal rectifiers and regulators produce four stable DC output rails. Because each rail feeds a dedicated backplane bus, noise stays isolated between logic and I/O. The A16B-1212-0871 therefore supports mixed digital and analog loads.
Energy Storage and Power Draw
Electrolytic capacitors inside the unit store energy briefly after shutdown. This stored charge smooths ripple and holds output voltage during line sags. Consequently, service technicians must wait before touching internal terminals. System designers should therefore follow the manufacturer’s discharge interval.
Installation Notes
Operators mount the chassis inside the CNC control cabinet with four screws. Adequate clearance around the enclosure allows natural convection cooling. Meanwhile, a thermal cutoff protects the unit from sustained overload. Always verify input voltage selection before energizing the supply.
Details
| Weight | 1.5 kg |
|---|---|
| Dimensions | 278 × 194 × 42 mm |
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